xen_modified_memory() sets errno to communicate what went wrong so log
this rather than the return value which is not interesting.
Signed-off-by: NRoss Lagerwall <ross.lagerwall@citrix.com>
Acked-by: NAnthony PERARD <anthony.perard@citrix.com>
Signed-off-by: NStefano Stabellini <sstabellini@kernel.org>